Estimation of Strength Properties of Binary and Ternary Blend Concrete by Experimental and Analytica

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Estimation of Strength Properties of Binary and Ternary Blend Concrete by Experimental and Analytical Tools Pavan A. Byakodi1, Umesh P. Patil2 1M-Tech

Student in Dept. of Civil Engineering, KLE Dr. MSSCET, Belagavi – 590008(Karnataka) Professor, Dept. of Civil Engineering, KLE Dr.MSSCET, Belagavi – 590008 (Karnataka).

---------------------------------------------------------------------***--------------------------------------------------------------------cement that is fairly nice from the point of economy, Abstract - In this work residual compressive strength and power efficiency, durability, and usual ecological and tensile strengths of ternary and binary blend concrete when subjected to elevated temperatures of 320C 200 400 and 6000C environmental benefits.

2Associate

were investigated. Three mixes in which one was control mix having no admixtures and two mixes were binary blend concrete having 20% RHA and 10% Metakaolin were prepared. One more mix of ternary blend concrete consisting of 20%RHA and 10%Metakaolin. M Sand was used in all these mixes as fine aggregate. Multiple linear regression analysis was also carried out. Non-Destructive testing methods VIZ Rebound Hammer and Ultrasonic Pulse Velocity tests were also conducted to study the deviation in the results. Results of these experimental and analytical investigations reveal that use of M Sand dramatically improve the target strength (Predicted by using IS Code). Binary blend concrete containing 10% Metakaolin as cement replacement material outperforms all other admixture combinations at all the temperatures considered. Experiments also indicate that binary blend containing 20% RHA as cement replacement material is not suitable when concrete is exposed to elevated temperatures.

Key Words: Rice Husk Ash, Metakaolin, Regression, NonDestructive Tests

2. MATERIAL AND METHODOLOGY 2.1 Materials The OPC 43 Grade cement of Ultra-Tech has been used in the experimental work. Manufactured sand of specific gravity 2.6, Coarse aggregates used in the project work are of 20 mm down size and have specific gravity of 3. Conplast SP430 is a chloride free super plasticizing admixture which is brown in color and dispersible in water. Rice husk ash of density is 0.78 g/cc and specific gravity of 2.1 used. Metakaolin of specific gravity of 2.5.The properties of Cement, Metakaolin and RHA are represented in Table 1, 2 and 3 respectively.

Table -1: Physical Properties of Cement

1. INTRODUCTION Concrete is the most required material in modern creation. It has versatile property like easy mouldability, excessive compressive strength. The concrete became major construction material due to all those properties. These characters of concrete have made it most popular creative element for all kinds of civil engineering works. It has been followed in architectural structures which require high degree of performance and aesthetic appearances. It is received with the aid of mixing cement, water, and aggregates in required mix proportion. The hardening is caused by chemical action among water and cement. Further huge quantity of residue is getting generated from industries as a byproduct. Some of such byproducts are Fly Ash (Pulverized fuel Ash, PFA), Ground Granulated Blast Furnace Slag (GGBFS), Metakaolin, Silica Fume (Micro Silica), Me and Rice Husk Ash (RHA) are cementitious in nature and may be supplemented to © 2017, IRJET

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Table -2: Properties of Metakaolin

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testing machine. Non-destructive tests using Rebound hammer and Ultra-sonic pulse velocity machine were conducted before crushing.

Table -3: Properties of RHA

3. EXPERIMENTAL RESULTS AND DISSCUTION 3.1 Compressive strength 2.2 Mix Proportioning In the present investigation four different mixes were prepared. The strength was targeted as 38.25N/mm2.The mix design was done using IS 10262:2009 and the mix proportion of 1:1.46:2.88 and w/c 0.42 is used. To find out the effect of Metakaolin and RHA different mixes were prepared Mix proportions for mixes were adopted are as shown in Table 4.

Table -4: Mix Proportioning per m3 of Concrete

Compressive strength test results for all four mixes at different temperatures are presented in Table 5. Figure 1 shows the variation in compressive strength of different mixes at different temperatures. From Fig. 1 shows Variation of Compressive strength at different temperatures, it is observed that in case of binary mix containing 10% of Metakaolin, the performance is more satisfactory when compared with all other mixes including the control mix.

Table -5: Compressive strength of all mixes at different temperatures

2.3 Mixing Procedure First cement, M-Sand and Coarse aggregates were dry mixed. Admixtures were added to the batch in dry state as per the mixes. Then small quantity of water was added to make concrete paste and remaining quantity of water was added with super plasticizer. Mixing is done till paste become uniform.

2.4 Casting And Curing The casting of specimens was done as soon as mixing was over. The concrete was filled in three layers in the cubes mold as well as in the cylinder mold. To remove the entrapped air in the concrete proper compaction was carried out. Second day, molds were de-molded and specimens were taken out for curing. The curing of specimens was done by normal water curing for 28 days. Next day these specimens were heated at higher temperature and brought back to normal temperature by air cooling 2.5 Testing Concrete cubes of 15 cm * 15 cm *15 cm were casted and Concrete cylinders of 150 mm Ă˜ and 300 mm height were casted and they are tested on Compression Š 2017, IRJET

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Fig 1: Variation of Compressive strength(MPa) at different temperature

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3.2 Spilt Tensile strength Split Tensile strength test results for all four mixes at different temperatures are presented in Table 6. Figure 2 shows the variation in tensile strength of different mixes at different temperatures. From Fig. 2 shows Variation of Tensile strength at different temperatures, it is observed that in case of binary mix containing 30% of GGBS, the performance is more satisfactory when compared with all other mixes including the control mix.

down by pressing it on the surface and compressive strength in N/mm2 is calibrated using Schmidt chart.

Ultra Sonic Pulse Velocity test is a qualitative Nondestructive test. The test is conducted as per IS 13311part 2,1992 and the readings are obtained in km/sec.

Then we can predict the quality of concrete using chart given in IS code. The Results of Rebound Hammer and Ultrasonic Pulse Velocity conducted on concrete specimens are tabled below.

Table -7: Non Destructive Test Results

Table -6: Split Tensile strength of all mixes at different temperatures

4. REGRESSION ANALYSIS For statistical analyses, multivariable linear regression analysis (MRA) was employed. The purpose of MRA is to simultaneously identify two or more independent variables that explain variations in the dependent variable. The general MRA equation is given below, with the dependent variable being a linear function of more than one independent variable. For prediction of the compressive strength of admixture concrete before production, compressive strength is considered as a dependent variable, while the proportions of cement, RHA, Metakaolin and Temperature are independent variables. The generalized equation obtained is given below fck = 54.308 + 0.001187 * C – 0.1784 * RHA + 0.001 * MK - 0.01635 * T

Fig 2: Variation of Split Tensile strength(MPa) at different temperature

Where fck = Compressive Strength (MPa)

3.3 Non-Destructive Test The Rebound Hammer test is conducted as per IS 13311-part 2,1992. The rebound number is noted Š 2017, IRJET

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C = Cement (kg) RHA= Rice Husk Ash (kg) ISO 9001:2008 Certified Journal

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MK = Metakaolin (kg)

for 2 hours, compressive strength increase, but there is a decline in tensile strength. Tensile strength marginally reduces in all the mixes compared to control mix. Here also concrete containing 10% Metakaolin has performed better in compression than other mixes at 400 oC. 3) Validation of experimental data was statistically done using multivariable linear regression analysis (MRA) in EXCEL 2016 version Satisfactory values of correlation coefficient (R) and determination coefficient (R2) were obtained.

T = Temperature ( 0 C Table -8: Predicted strengths of all mixes at different temperatures

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Krishna, R. N. "Rice husk ash—an ideal admixture for concrete in aggressive environment." Recycling construction Waste for sustainable development.

Organized by CREAM, UiTM, ACCI and CSM, Kuala Lumpur (2008).

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Aydin, Ferhat, and Mehmet Saribiyik. "Correlation between Schmidt Hammer and destructive compressions testing for concretes in existing buildings." Scientific Research and Essays 5.13 (2010): 1644-1648

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Maroliya, M. K. "A qualitative study of reactive powder concrete using X-Ray diffraction technique." IOSR Journal of Engineering (IOSRJEN) 2.9 (2012): 12-16.

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Atici, U. "Prediction of the strength of mineral admixture concrete using multivariable regression analysis and an artificial neural network." Expert Systems with applications 38.8 (2011): 9609 -9618.

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Sule E et al (2014) “The Effect of Metakaolin on Compressive Strength of Rice Husk Ash Concrete at Varying Temperatures” Civil and Environmental Research ISSN 2224-5790 (Paper) ISSN 2225-0514 (Online) Vol.6, No.5, 2014

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waminathen, A. N., and S. Robert Ravi. "Use of Rice Husk Ash and Metakaolin as Pozzolonas for Concrete: A Review." International Journal of Applied Engineering Research 11.1 (2016): 656-664.

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Bastwadkar, Kushal Krishna, and Kishor S. Kulkarni.

"Effect of Embedded Length and Bar Diameter of Reinforcement on Bond Strength Behavior of High Strength Concrete Subjected to Elevated Temperatures."

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Ganesan, K., K. Rajagopal, and K. Thangavel. "Rice husk ash blended cement: assessment of optimal level of replacement for strength and permeability properties of concrete." Construction and Building Materials 22.8 (2008): 1675-1683

Fig 3: Variation of Residual Strength of all mixes Fig -1: Name of the figure

5. CONCLUSIONS The following conclusions are drawn from the study 1) At normal temperature, mix containing 10% Metakaolin has performed better than other mixes (including the control mix) both in compression and tension”. Increased compressive strength is due to Metakaolin and manufactured sand.

2) When all these mixes are subjected to an elevated temperature of 200oC, 400oC, 600oC © 2017, IRJET

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Volume: 04 Issue: 06 | June -2017

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[9]

Givi, Alireza Naji, et al. "Contribution of rice husk ash to the properties of mortar and concrete: a review."

Journal of American science 6.3 (2010): 157-165.

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Mani Kandhan.K.U (2015) “Mechanical Properties Of High Strength Concrete By Using M-Sand As A Fine Aggregate” International Conference On Recent Trends In Engineering Science And Management ISBN: 978-81931039-2-0 Jawaharlal Nehru University, Convention Center, New Delhi (India), 15 March 2015.

BIOGRAPHIES Pavan A. Byakodi M-Tech Student Civil Engineering Department in KLE Dr. M. S. Sheshgiri College of Engineering and Technology, Belagavi, 590 008 Karnataka Shri Umesh P. Patil is working as a Associate Professor, Civil Engineering Department in KLE Dr. M. S. Sheshgiri College of Engineering and Technology, Belagavi,590 008 Karnataka. He has work experience of 20 years. He has published 10 papers in international journals and presented 3 papers in international conferences. He has written a text book entitled as “Oil Power Hydraulics and Pneumatics” (1994)

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